Perhaps you should try some spelling variations:
thanh do » thanh de, thanh pho, thanh hoa
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
cam luc » cau luc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
do cua » doi cua, co cua, de cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) y nang x hoi. hieu va ((cam luc) or (cam xuc)) va thanh do cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y nang x hoi. hieu va ((cam luc) OR (cam xuc)) va thanh do cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) y nang x hoi. hieu va ((cam luc) or (cam xuc)) va thanh do cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) y nang x hoi. hieu va ((cam luc) or (cam xuc)) va thanh do cua tre*.